WASHINGTON (CNN) – Americans appear to be souring on Sarah Palin, according to a new national poll.

Thirty-nine percent of people questioned in a CNN/Opinion Research Corporation survey released Wednesday have a favorable opinion of the former Alaska governor and last year's Republican vice presidential nominee. That's down seven points from a poll conducted in May, and it's also nine points lower than the 48 percent who now say they now view Palin unfavorably. Forty-three percent viewed Palin negatively in May.